Thread: save data held in memory into the file

/** save * Obtain file name from user and save locations and depths for all data
* currently in memory. If the file exists, append the data, otherwise
* create a new file.
* Data is saved in format:
* Line 1: Pit Location - A name that may contain spaces.
* Line 2: Pit Depth - Depth of pit in meters (2 decimal places)
*
* @param location array of strings containing the pit locations
* @param depth array of doubles containing the pit depths
* @param numdata integer

insert

Code:

 int save_data()
 { 
   double depth[MAX_SIZE] =  depth(toBottom);
  printf("\n Enter name of file to enter pit data to:\n");
   gets (filename);
   if((fileptr= fopen(filename, "a"))==NULL)
			   {
    printf("Error opening %s for writing. Program terminated.", filename);
    abort();
  }
  
  size_t fwrite(
   const void *location, size_t MAX_SIZE, size_t i, FILE *fileptr);
  
   
  fclose (fileptr);
  return i;
  }

how should i write depth and location such that when printed they look like below:
eldorado 01 -3.14
also when i try to compile i get a error
called object'depth' is not a function

Code:

 int save_data()
 { 
   double depth[MAX_SIZE] =  depth(toBottom);
  printf("\n Enter name of file to enter pit data to:\n");
   gets (filename);
   if((fileptr= fopen(filename, "a"))==NULL)
			   {
    printf("Error opening %s for writing. Program terminated.", filename);
    abort();
  }
  
  size_t fwrite(
   const void *location, size_t MAX_SIZE, size_t i, FILE *fileptr);
  
   
  fclose (fileptr);
  return i;
  }

Probably because the object that goes by teh name "depth" is not function, yet you are trying to use it as such.

And to answer your question, and raise one of my own, why use fwrite? Just use fprintf().

Good point.

Code:

int save_data()
{ 
  double depth[MAX_SIZE] =  depth(toBottom);
  printf("\n Enter name of file to enter pit data to:\n");
  gets (filename);
  if((fileptr= fopen(filename, "a"))==NULL)
  {
    printf("Error opening %s for writing. Program terminated.", filename);
    abort();
  }
  
  size_t fwrite(const void *location, size_t MAX_SIZE, size_t i, FILE *fileptr);
  
   
  fclose (fileptr);
  return i;
}